Update s3 website to honor --error-document argument

When both --index-document and --error-document options are supplied,
--error-document argument was ignored.
Update s3 website to honor --error-document argument

When both --index-document and --error-document options are supplied,
--error-document argument was ignored.
Merge branch 'fix-s3-get-bucket-website' of github.com:quiver/aws-cli into fix-s3-get-bucket-website
test each command in separate test case
Merge branch 'quiver-fix-s3-get-bucket-website' into develop

* quiver-fix-s3-get-bucket-website:
  test each command in separate test case
  Update s3 website to honor --error-document argument
  Update s3 website to honor --error-document argument
Update CHANGELOG.rst with latest changes

Also cloudsearch is *not* part of 1.3.5 so moved it out of that
section.